Automatic braking device



Apl s, 194s.

`H. w. ALLEN AUTONUTICJ BRAKING DEVICE Filed Aug. 18, 1944 2Sheets-Sheet 1 fm1 l F/GZ April 6, 1948. H. w.v ALLEN 2,438,887

AUTOMATIC BRAKING DEVICE Filed Aug. 18, 1944 2 sheets-sheet z` FIG. 6

Patented Apr. 6, 1948 2,438,887 AUTOMATIC BnAmNa DEVICE p Harry W'.Allen, Dayton, Ohio 1 Claim.

The invention described herein may be 'manutactured and used by or forthe Government for governmental purposes, without the payment to me ofany royalty thereon. f

The invention to be hereinafter described relates to automatic brakesfor reels.

There are a great number and variety of oice machines for reeling tapeor ribbon-type sheets from spool to spool across a plate or table forreceiving or sh'owing data of various kinds. The reeling or travel ofthe strip is intermittent, as is well understood, with frequent briefstops 'for one reason or another, according tothe use of the machine. Inorder that the strip may be properly used whether for supplying data bybeing read or for receiving data, it should be maintained straight, flatand relatively taut or under suitable tension. In machines of thisclass, as heretofore built, there has been no simple and practical meansor `device for maintaining proper tautness or tension of the stripimmediately following temporary stoppages. Instead, at every suchstoppage there has been more or less over-run or unwinding `fromthedelivery `or supply roll with corresponding slack, looseness and lackof tension in the strip. The objects of the present invention are toovercome the above and oth'er objections and provide a simple,- efcient'and compact device for automatically minimizing all such slackness andsimultaneously taking up any` slack not eliminated.

An important aim of the invention is to present an automatic brakedevice which is adapted to be produced at low cost, suitable forincorporation in conventional reeling and unreeling devices such asbilling, order writing, manifolding machines and the like, withoutrequiring extra space or special framing, by permitting its mountingupon usual side frame plates. It is also an aim to present such anautomatic brake, which will be liable in a minimum degree to derangementor excessive wear in the use to be expected at sales counters, stockrooms and the like.

In order to more clearly disclose the construction, operation and use ofthe invention, reference should be had to the accompanying drawingsforming part of the present application.

In the drawings:

Fig. 1 is an isometric perspective view showing the invention applied toa machine of the general character last mentioned above;

Fig, 2 is a left hand end view `oi? Fig. 1 enlarged;

Fig. 3 is an enlarged fragmentary side elevation, with the near sideplate removed, showing Application August `18, 1944, serial No.,55o,11of (Granted under the act of March 3, 1883, as amended April 30, 1928-;370 0. G. '157) the relative position of feed, idler and rstguid rolls;

plied. It may be any one of a wide rangeiof:

standard and accepted machines in general use for reeling or windingstrips or ribbons from spool,` reel or roll 3 lat one end of the machineacross over a table or plate and onto another u spool, -reel or roll 2atlthe opposite emi.` The spool laxes are journaled in the frame X` andslipped into and removed from place through slots 'side wall X of themachine.

I5, alllin well known manner. The receivinglroll 2 is driven through -asuitable gear train I6 from a small motor device I'I with the usualIstop-andgo switch I8 and speed control, not shown, .all as is wellknown. Transverse horizontal guide rolls 2|` are mounted at each end oftheframe near, and at the level of, the table plate 20. Y i. vp i, `In*Figs. `3, 4 and 5, particularly, the construction, arrangementlandvapplication of the invention in such machines is clearlyillustrated., Y 1

,In the well knowntype of reeling machine `used, to illustrate theinvention, the record'tape, strip, sheet, web or ribbon I, reeled on thereceiving roll 2 is unreeled or delivered from feed roll 3. From roll 3th'e tape is looped rearwardly down, behind, under around and upwardlyfrom an idler roll 4 journaled in the outer swinging ends of the brakereleasing side arms of a pivotally mounted or swinging U-yoke or frame5. While this is the preferred construction, it will be understood thata single, or parallel separate arms or parallel connected arms may beused to carry the roll 4. From each side arm of the yoke or frame 5, ator near the lower pivoted end, eX- tends a short stub shaft or pivot 6by which the U-yoke is pivotally journalled in the respective Thesepivots are close to the vertical plane of the shaft I9 of the roll 3,and the frame 5 swings freely back and forth across this plane below theroll 3 and its web load. Fixed to and movable with each pivot I (andconsequently xed with the arms at 5) there is a short foot or lift camor crank arm 1, for a purpose to be later disclosed. As sh'own in thedrawings (particularly Figs. 3, 4 and 5), arm 1 with yoke 5 and pivot 6present substan- Fi-g. 4 is an enlarged diagrammatic View oftheautomatic brake mechanism in releasing position;. Fig. 5 is a likeview in holding position; and` i.,

Fig. 6 is -a detail of the idler roll mounting and appreciable brakingforce, a spring I I is used, mounted on the wall X and'having an endpress# ing downward on a pin set in the siderofthhr 8. As the tape,ribbon or the like is dratvvn tovy rd the receiving roll 2 when themotor'irat's y He latter, it will swing the id1er -,4tovvaiglgtheireceiving roll 2, as shown in Fig.' L MI'riyvthaz'*position, as shown, foot 1 lifts bar 8 so that-ritslyke -9 isclear of drum Il), permitting free Lljunning ifeedmg action of rou a.onvsgiejsteiige, tension on the strip or ribbonisrhvdnd kus at?,

It is thought that the construction, operation and use of the inventionwill be clear from the l preceding detailed description.v

Many changes may be made in the construc- 5 tion,\ arrangement anddisposition of the parts of the invention within the scope of theappended glailin without,tdepartingglrgin threeldof the inneitfsreanttomdegail :such within vemo t'lfsapplication vvhereibnly" one 'preferredform has been illustrated purely by way of example.

"Having thus `described my invention, what I "glairnggrrdglesire toprotect by Letters Patent is:

An rautoinatic brake for intermittent web unreeling`-rolfls`comprisingIa rotatable reel shaft, a ifed onthe shaft, a support therefor, a brakeably/longitudinally on said support radially in I *relationtothfe drinnKand having its medial line "i'latnggdina" adia'r-piane of the shaft anddrum,

zo' aenoeyok rodi-fed on ine bar having an opening therein receiving thesaid drum loosely therewith'- in'saiu bpeningbeing" elongated in thedirection or sliinpmovementioftnepar 'teclear the'durn at" tintes,4resilihtfmans coenga'ged' lietween the support and brake bartending-"to"apply'tlieshe i i' tce'th'e idrul'n in`e"direction^`of'slid'ir'ifg'hrovenint of the bar, a brake'relase'arm pivotedadistancefront saidA shaft and 'closelyadjacent:y said"fatiia1 planeofthe shaft;the free' endfoftheiarm'be'in'g 30` toward the shaftandv movable"tovva'r'dfan'd from ''f said1 plane betweentheshaft'and' the pivotofIthe arm; a'nfidler'rollcarriedfby the reepa'rtof the brakelreleaiseiarrnposi'tio'nefdi to receive therearound `afloop fL-webyvhenfsuchloop isextended 35 fromf'said'f'reel'penerally l"atg asubstantial' Langle iiiacross'saidiplanfand 'a'crank arm`xedwit1ithe elesearnr engag'edfarossand'bearng on a part of"'-'tii`' bra-lebar; saidv crankarm extending-Yfrom thereleafsefarm Aiii a ii'iectiuriito--move the"bar ,ogainst'action of'fsaid resilient means under pull .-f offavveblo'opengag'e'daround'saididlerr^ "M" summons. .onlin vThe follgwhig.rffeselsfs arg1?? re 1,111, .the

' Number Y Y Name l 1 Date 1950;473 cmibenetn Maru; 1910 Certificate ofCorrection Patent No. 2,438,887. April 6, 1948. HARRY W. ALLEN It ishereby certified that errors appear in the above numbered patentrequiring correction as follows: In the grant, lines 1 and 13, name ofinventor, for Henry W. Allen read Harry W. Allen; and that the saidLetters Patent should be read with these corrections therein that thesame may conform to the record of the case in the Patent Office.

Signed and sealed this 1st day of June, A. D. 1948.

THOMAS F. MURPHY,

Assistant Oom/Infissoner of Patents.

